void init_createfile()
{
    int i;
    argv[1]="init_file.txt";
    char exit_file[100]="init_file.-";
   strcat(exit_file,user.user_name);
    for(i = 0; i < INODENUM; i++)
{
if((inode_array[i].inum > 0) &&
(inode_array[i].type == '-') &&
!strcmp(inode_array[i].file_name, exit_file))
return ;
}
    for(i = 0; i < INODENUM; i++)
if(inode_array[i].inum < 0) break;
if(i == INODENUM)
{
printf("Inode is full.\n");
exit(-1);
}
inode_array[i].inum = i;
strcpy(inode_array[i].file_name, argv[1]);
inode_array[i].type = '-';
strcpy(inode_array[i].user_name, user.user_name);
inode_array[i].iparent = inum_cur;
inode_array[i].length = 0;
save_inode(i);
}

